Shouzheng Knowledge Class: Interpret Eva Insulation Film

What we want to explain to you this time is the thermal insulation of EVA film.

First of all, I believe that many friends know that EVA this material.

In fact, EVA is short for ethylene-vinyl acetate copolymer, and EVA materials are very widely used, such as foam shoes, film, wire and cable, etc.

Today we are mainly talking about the application of film, that is, EVA Greenhouse Film.

EVA, as a material with good thermal insulation performance, is often widely used in agriculture in the winter shed film with higher requirements for thermal insulation, such as EVA Greenhouse Film.

As we all know, the growth of crops often needs a high temperature, so the insulation is also an important indicator to measure the quality of the winter shed film.

Since we talk about insulation, we need first to introduce how to achieve insulation.

When the sun rises during the day, the sun will pass through the film, making the temperature in the shed rise rapidly.

After the evening, especially in winter, the ambient temperature is relatively low. We hope that the shed can still maintain a high, suitable for a temperature of crop growth.

To achieve this purpose, from the material, we don't want excessive heat from the shed, but at night, the ground will absorb energy and in the form of long wave infrared outward scattering, for EVA film, its long wave infrared transmittance is far lower than ordinary polyethylene film, so, there are more energy is left in the shed, make the implementation effect of heat preservation, help crop growth.